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首页> 外文期刊>Bangladesh Journal of Medical Science >Dimensional changes of hard and soft tissue after immediate implantation in comparison with conventional tooth extraction
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Dimensional changes of hard and soft tissue after immediate implantation in comparison with conventional tooth extraction

机译：与常规拔牙相比，即刻植入后硬组织和软组织的尺寸变化

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Introduction: Immediate implantation in single-root teeth has been claimed to possess some benefits, especially bone preservation. The aim of this study was to evaluate ridge changes after immediate implantation in comparison with tooth extraction and dental socket healing.Methods and Materials: In this study, 21 patients with hopeless single-root teeth were selected. After impression and cast making, the patients were divided into test and control groups. Each group included twelve dental sockets. For all teeth the extraction was performed atraumatically. Measurements included bucco-lingual ridge dimensions at 3mm and 7mm apical to an imaginary line connecting the CEJs of the two adjacent teeth (CEJ line) as well as vertical distance between the mentioned line and bone crest at the misobuccal, midbuccal, distobuccal, mesiopalatal, midpalatal, and distopalatal aspects. In addition, soft tissue measurements similar to hard tissue ones were taken using stone casts and acrylic stents. In test group immediate implantation was carried out following extraction whereas in the control group dental sockets were left for natural healing. Four months after the operation, in both groups, the flap was reflected and measurements taken at baseline were repeated.Results: Vertical changes of soft tissues in test group were significantly less than control group at all points except in mid-buccal aspect (p=0.033 for mesiobuccal, p=0.026 for distobuccal, p=0.004 for midpalatal, p=0.002 mesiopalatal, p=0.022 for distopalatal, p=0.016 for distal, p=0.048 for mesial). Horizontal dimension change of soft tissue at 7mm apical to the CEJ line in test group, were also significantly less than control group (p= 0.051). Vertical changes of hard tissue, measured in all points, in test group were less than those of control group. These changes were significant in mid-buccal, mid-palatal, mesiopalatal and distopalatal points (p= 0.046, 0.029, 0.020 and 0.026 respectively). Horizontal changes of hard tissue at 3mm and 7mm apical to the CEJ line in test group were also less than control group. However, this was significant only at the 3mm point (p=0.028).Conclusion: According to the results of this study, it can be concluded that immediate implantation is to some extent effective in reducing the expected vertical and horizontal bone and soft tissue changes occurring following conventional tooth extraction and natural socket healing. Further investigation is warranted to determine the optimum method of preventing these changes.Bangladesh Journal of Medical Science Vol.15(3) 2016 p.335-342
机译：简介：据称立即植入单根牙具有一些好处，尤其是保留骨骼。这项研究的目的是与拔牙和牙槽窝愈合相比，评估即刻植入后的牙槽变化。方法和材料：本研究选择了21例无希望的单根牙患者。经过压模和铸造后，将患者分为测试组和对照组。每组包括十二个牙槽。对于所有牙齿，无创伤地进行拔除。测量包括颊舌舌脊尺寸，其在连接两个相邻牙齿的CEJ的假想线（CEJ线）的顶端分别为3mm和7mm，以及上述线与颊侧，颊侧，足颊，中睑， pal中和足顶方面。此外，使用石塑和丙烯酸支架对软组织进行类似于硬组织的测量。在测试组中，拔牙后立即植入，而在对照组中，保留牙槽自然愈合。术后四个月，两组均反射皮瓣并在基线进行重复测量。结果：除颊中部外，所有部位测试组软组织的垂直变化均显着小于对照组（p =中颊颊为0.033，足颊为p = 0.026，中pal为p = 0.004，中后睑为p = 0.002，足顶为p = 0.022，远端为p = 0.016，内侧为p = 0.048）。在测试组中，距CEJ线顶端7mm处的软组织水平尺寸变化也显着小于对照组（p = 0.051）。试验组各部位测得的硬组织垂直变化均小于对照组。这些变化在颊中部，pal中部，中上睑下侧和足顶上的点均显着（分别为p = 0.046、0.029、0.020和0.026）。试验组CEJ线顶端3mm和7mm处硬组织水平变化也小于对照组。然而，这仅在3mm处有意义（p = 0.028）。结论：根据这项研究的结果，可以得出结论，即刻植入在一定程度上有效减少了预期的垂直和水平骨及软组织的变化发生在常规拔牙和自然牙槽愈合之后。为了防止这些变化的最佳方法，有待进一步研究。孟加拉国医学杂志Vol.15（3）2016 p.335-342

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